| 1952 |
B |
Allentown Cardinals, Hagerstown Braves, Harrisburg Senators, Lancaster Red Roses, Salisbury Reds, Sunbury Giants, Wilmington Blue Rocks, York White Roses |
| 1951 |
B |
Allentown Cardinals, Hagerstown Braves, Harrisburg Senators, Lancaster Red Roses, Salisbury A's, Sunbury Giants, Wilmington Blue Rocks, York White Roses |
| 1950 |
B |
Allentown Cardinals, Hagerstown Braves, Harrisburg Senators, Lancaster Red Roses, Sunbury A's, Trenton Giants, Wilmington Blue Rocks, York White Roses |
| 1949 |
B |
Allentown Cardinals, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Sunbury Reds, Trenton Giants, Wilmington Blue Rocks, York White Roses |
| 1948 |
B |
Allentown Cardinals, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Sunbury Reds, Trenton Giants, Wilmington Blue Rocks, York White Roses |
| 1947 |
B |
Allentown Cardinals, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Sunbury Yankees, Trenton Giants, Wilmington Blue Rocks, York White Roses |
| 1946 |
B |
Allentown Cardinals, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Sunbury Yankees, Trenton Giants, Wilmington Blue Rocks, York White Roses |
| 1945 |
B |
Allentown Cardinals, Hagerstown Owls, Lancaster Red Roses, Trenton Spartans, Wilmington Blue Rocks, York White Roses |
| 1944 |
B |
Allentown Cardinals, Hagerstown Owls, Lancaster Red Roses, Trenton Packers, Wilmington Blue Rocks, York White Roses |
| 1943 |
B |
Allentown Wings, Hagerstown Owls, Lancaster Red Roses, Trenton Packers, Wilmington Blue Rocks, York White Roses |
| 1942 |
B |
Allentown Wings, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Trenton Packers, Wilmington Blue Rocks |
| 1941 |
B |
Allentown Wings, Bridgeport Bees, Hagerstown Owls, Harrisburg Senators, Lancaster Red Roses, Reading Brooks, Trenton Senators, Wilmington Blue Rocks |
| 1940 |
B |
Allentown Wings, Harrisburg Senators, Hazleton Mountaineers/Lancaster Red Roses, Reading Chicks, Sunbury Indians, Trenton Senators, Wilmington Blue Rocks, York Bees |
| 1939 |
C |
Allentown Dukes, Hazleton Mountaineers, Sunbury Senators, Trenton Senators |
| 1932 |
D |
Lancaster Red Sox, Norristown/St. Clair Saints, Pottstown Legionaires, Stroudsburg Poconos, Tamaqua/Slatington Dukes, Washington Potomacs |
| 1917 |
D |
|
| 1916 |
D |
Bradford Drillers, Erie Sailors, Johnsonburg Johnnies, Olean White Sox, Ridgway, St. Marys Saints, Warren Warriors, Wellsville Rainmakers |
| 1915 |
D |
Bradford Drillers, Hornell Maple Leafs, Jamestown Rabbits, Olean White Sox, Warren Bingoes, Wellsville Rainmakers |
| 1914 |
D |
Bradford Drillers, Hornell Green Sox, Jamestown Giants, Olean Refiners, Warren Bingoes, Wellsville Rainmakers |
| 1913 |
B |
Akron Giants, Canton Senators, Columbus Cubs, Erie Sailors, Steubenville Stubs, Wheeling Stogies, Youngstown Steelmen, Zanesville Flood Sufferers |
| 1909 |
D |
|
| 1908 |
D |
Bradford Drillers, Erie Fishermen, Franklin Millionaires, Oil City Cubs, Olean Candidates, Warren Blues |
| 1907 |
D |
Bradford Drillers, DuBois Miners, Erie Sailors, Franklin Millionaires, Kane Mountaineers, Oil City Oilers, Olean Refiners, Punxsutawney Policemen |
| 1906 |
D |
Bradford Drillers, DuBois Miners, Erie Sailors, Hornell/Patton Pigmies, Kane Mountaineers, Oil City-Jamestown Oseejays, Olean Refiners, Punxsutawney Policemen |
| 1905 |
D |
Bradford Drillers, Coudersport Giants, Erie Fishermen, Jamestown Hill Climbers/DuBois Miners, Kane Mountaineers, Olean Refiners |
| 1900 |
B |
Columbus Senators/Anderson Anders, Dayton Veterans, Fort Wayne Indians, Mansfield Haymakers, New Castle Quakers, Toledo Mud Hens, Wheeling Stogies, Youngstown Little Giants/Marion Glass Blowers |
| 1899 |
B |
Dayton Veterans, Fort Wayne Indians, Grand Rapids Furniture Makers/Springfield Wanderers/Columbus Se, Mansfield Haymakers, New Castle Quakers, Toledo Mud Hens, Wheeling Stogies, Youngstown Little Giants |
| 1898 |
B |
Dayton Old Soldiers, Fort Wayne Indians, Grand Rapids Cabinet Makers, Mansfield Haymakers, New Castle Quakers, Springfield Governors, Toledo Mud Hens, Youngstown Puddlers |
| 1897 |
B |
Dayton Old Soldiers, Fort Wayne Indians, Mansfield Haymakers, New Castle Quakers, Springfield Governors, Toledo Mud Hens, Wheeling Nailers, Youngstown Puddlers |
| 1896 |
C |
Fort Wayne Farmers, Jackson Wolverines, New Castle Salamanders, Saginaw Lumbermen, Toledo Mud Hens, Washington Little Senators, Wheeling Nailers, Youngstown Puddlers |
| 1886 |
Sp |
Aurora, Bloomington Reds, Peoria Reds, Terre Haute Hoosiers |